Hello I've just discovered that when optuna saves my param values to RDBStorage for each trial I am losing a lot of precision on those values, because they are going into a MySQL "FLOAT" column when they should be going into a "Double" or "Decimal" column.

Is there any way to solve this? I don't see any way of doing it through the RBDStorage class...

It creates large performance discrepancies when I try to reproduce models from studies using these modified param values.